  <template>
    <a-layout>
      <a-layout-content
          :style="{ background: '#fff', padding: '24px', margin: 0, minHeight: '280px' }"
      >
        <div class="about">
          <h1>电子书管理</h1>
        </div>

        <p>
          <a-form layout="inline" :model="param">
            <a-form-item>
              <a-input v-model:value="param.name" placeholder="名称">
              </a-input>
            </a-form-item>
            <a-form-item>
              <a-button type="primary" @click="handleQuery({page: 1, size: pagination.pageSize})">
                查询
              </a-button>
            </a-form-item>
            <a-form-item>
              <a-button type="primary" @click="add()">
                新增
              </a-button>
            </a-form-item>
          </a-form>
        </p>

        <a-table
            :columns="columns"
            :row-key="record => record.id"
            :data-source="ebooks"
            :pagination="pagination"
            :loading="loading"
            @change="handleTableChange">    <!-- 点击分页时，执行该方法 -->

          <!-- 定义两个渲染，第一个是封面图，第二个是按钮 -->
          <template #cover="{ text: cover }">
            <img v-if="cover" :src="cover" alt="avatar" />
          </template>

          <template v-slot:action="{ text, record }">
            <a-space size="small">
              <router-link :to="'/admin/doc?ebookId=' + record.id">
                <a-button type="primary">
                  文档管理
                </a-button>
              </router-link>
              <a-button type="primary" @click="edit(record)">
                编辑
              </a-button>
              <a-popconfirm
                  title="删除后不可恢复，确认删除？"
                  ok-text="是"
                  cancel-text="否"
                  @confirm="handleDelete(record.id)"
              >
                <a-button type="danger">
                  删除
                </a-button>
              </a-popconfirm>
            </a-space>
          </template>
        </a-table>
      </a-layout-content>
    </a-layout>

    <a-modal
        title="电子书表单"
        v-model:visible="modalVisible"
        :confirm-loading="modalLoading"
        @ok="handleModalOk"
    >
      <a-form :model="ebook" :label-col="{ span: 6 }"  :wrapper-col="{ span: 18 }">
        <a-form-item label="封面">
          <a-input v-model:value="ebook.cover" />
        </a-form-item>
        <a-form-item label="名称">
          <a-input v-model:value="ebook.name" />
        </a-form-item>
        <a-form-item label="分类">
          <a-cascader
            v-model:value="categoryIds"
            :field-names="{ label: 'name', value: 'id', children: 'children' }"
            :options="level1"
            />
        </a-form-item>
        <a-form-item label="描述">
          <a-input v-model:value="ebook.description" tyep="textarea"/>
        </a-form-item>
      </a-form>
    </a-modal>
</template>

<script lang="ts">
  import { defineComponent, onMounted, ref} from 'vue';
  import axios from 'axios';
  import {message} from 'ant-design-vue'
  import {Tool} from "@/util/tool";

  export default defineComponent({
    name: 'AdminEbook',
    setup() {
      const param = ref();
      param.value = {}
      const ebooks = ref();
      const pagination = ref({
        current: 1,
        pageSize: 10,
        total: 0
      });

      const loading = ref(false);

      const columns = [
        {
          title: '封面',
          dataIndex: 'cover',
          slots: { customRender: 'cover' }
        },
        {
          title: '名称',
          dataIndex: 'name',
        },
        {
          title: '分类一',
          key: 'category1Id',
          dataIndex: 'category1Id',
        },
        {
          title: '分类二',
          key: 'category2Id',
          dataIndex: 'category2Id',
        },
        {
          title: '文档数',
          dataIndex: 'docCount'
        },
        {
          title: '阅读数',
          dataIndex: 'viewCount'
        },
        {
          title: '点赞数',
          dataIndex: 'voteCount'
        },
        {
          title: 'Action',
          key: 'action',
          slots: { customRender: 'action'}
        }
      ];

      /**
       * 数据查询
       * 注意
       *  params: {
            page: params.page,
            size: params.size
          }
       * 的写法，否则前端参数不能正确传递到后端
       */
      const handleQuery = (params: any) => {
        loading.value = true;
        // 通过axios去调用后端的接口
        axios.get("/ebook/list", {
          params: {
            page: params.page,
            size: params.size,
            name: param.value.name
          }
        }).then((response) => {
          loading.value = false;
          const data = response.data;
          if (data.success) {
            ebooks.value = data.content.list;

            // 重置分页按钮
            pagination.value.current = params.page;
            pagination.value.total = data.content.total;
          } else {
            message.error(data.message)
          }

        });
      };

      /**
       * 表格点击页码时触发
       */
      const handleTableChange = (pagination: any) => {
        console.log("看看自带的分页参数都有啥:" + pagination);
        handleQuery({
          page: pagination.current,
          size: pagination.pageSize
        });
      };

      /**
       * 表单
       * -----------------
       * 数组： [100, 101]对应： 前端开发/Vue
       */
      const categoryIds = ref();
      // 定义一个响应式变量ebook
      const ebook = ref();
      const modalVisible = ref(false);
      const modalLoading = ref(false);
      const handleModalOk = () => {
        modalLoading.value = true;
        ebook.value.category1Id = categoryIds.value[0];
        ebook.value.category2Id = categoryIds.value[1];

        // 调用后端接口执行保存操作
        axios.post("/ebook/save", ebook.value).then((response) => {
          modalLoading.value = false;
          const data = response.data;   // data = CommonResp
          if (data.success) {
            modalVisible.value = false;

            // 重新加载列表
            handleQuery({
              page: pagination.value.current,
              size: pagination.value.pageSize
            });
          } else {
            message.error(data.message);
          }
        });
      };

      const level1 = ref();

      /**
       * 查询所有分类
       */
      const handleQueryCategory = () => {
        loading.value = true;
        axios.get("/category/all").then((response) => {
          loading.value = false;
          const data = response.data;
          if (data.success) {
            const categorys = data.content;
            console.log("原始数组：", categorys);

            level1.value = [];
            level1.value = Tool.array2Tree(categorys, 0);
            console.log("树形结构：", level1.value);

            // 加载完分类后，再建在电子书信息，否则如果分类树加载很慢，则电子书渲染会报错
            handleQuery({
              page: 1,
              size: pagination.value.pageSize
            });
          } else {
            message.error(data.message);
          }
        });
      };

      /**
       * 编辑
       */
      const edit = (record: any) => {
        modalVisible.value = true;
        ebook.value = Tool.copy(record);
      };

      /**
       * 新增
       */
      const add = () => {
        modalVisible.value = true;
        ebook.value = {};
      };

      /**
       * 删除电子书
       */
      const handleDelete = (id: number) => {
        axios.delete("/ebook/delete/" + id).then((response) => {
          const data = response.data;
          if (data.success) {
            // 重新加载列表
            handleQuery({
              page: pagination.value.current,
              size: pagination.value.pageSize,
            });
          }
        });
      };

      /**
       * 初始的时候，先查询一次
       * 其中page和size要和后端接受的参数名称对应
       */
      onMounted(() => {
        handleQueryCategory();
      });

      return {
        param,
        ebooks,
        pagination,
        columns,
        loading,
        handleTableChange,

        edit,
        add,
        handleDelete,

        handleQuery,

        ebook,
        modalVisible,
        modalLoading,
        handleModalOk,

        categoryIds,
        level1,
      }
    }
  });
</script>